/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8   -*-│
│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8                                   :vi │
╚──────────────────────────────────────────────────────────────────────────────╝
│                                                                              │
│ Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>                      │
│ All rights reserved.                                                         │
│                                                                              │
│ Redistribution and use in source and binary forms, with or without           │
│ modification, are permitted provided that the following conditions           │
│ are met:                                                                     │
│ 1. Redistributions of source code must retain the above copyright            │
│    notice, this list of conditions and the following disclaimer.             │
│ 2. Redistributions in binary form must reproduce the above copyright         │
│    notice, this list of conditions and the following disclaimer in the       │
│    documentation and/or other materials provided with the distribution.      │
│                                                                              │
│ THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND       │
│ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE        │
│ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE   │
│ ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE      │
│ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL   │
│ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS      │
│ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)        │
│ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT   │
│ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY    │
│ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF       │
│ SUCH DAMAGE.                                                                 │
│                                                                              │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/tinymath/freebsd.internal.h"
__static_yoink("freebsd_libm_notice");

#if !(LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024)

/**
 * Splits number normalized fraction and exponent.
 */
long double
frexpl(long double x, int *ex)
{
	union IEEEl2bits u;

	u.e = x;
	switch (u.bits.exp) {
	case 0:		/* 0 or subnormal */
		if ((u.bits.manl | u.bits.manh) == 0) {
			*ex = 0;
		} else {
			u.e *= 0x1.0p514;
			*ex = u.bits.exp - 0x4200;
			u.bits.exp = 0x3ffe;
		}
		break;
	case 0x7fff:	/* infinity or NaN; value of *ex is unspecified */
		break;
	default:	/* normal */
		*ex = u.bits.exp - 0x3ffe;
		u.bits.exp = 0x3ffe;
		break;
	}
	return (u.e);
}

#endif /* long double is long */
